If you didn't get an eReader for Christmas, you may still be deciding which one to buy. This is a link to the Gizmodo review  on the nookColor and Kindle Fire before they were released in November. Each person needs to decide how they are going to use it to make the best decision. Do you need color for magazines and children's books? Do you want a mobile device to surf the web? Do you want a simpler, lighter device to just read novels? Do you like to read the back-lit screens in the dark or do you prefer the e-ink screens? The nookTouch and KindleTouch both have e-ink, are lighter and less expensive.
One major difference for library users is the downloading for library ebooks. The Kindle ebooks (yes, the library books are now compatible with the Kindles) use your Amazon account and can be downloaded wirelessly. For all nooks (including the Color), you must download first to a computer and then transfer through the USB cable.
If you have more questions, email Pat at email@example.com  and I will try to answer them. These devices are here at Schlow, if you want to look at them and compare.